Torsten Braun - University of Bern

Torsten Braun

Jan 26, 2011

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"User and Machine Authentication and Authorization Infrastructure for Distributed Testbeds"


The Wisebed wireless sensor network testbed provides a federated
experimentation facility covering several European universities. For
scalable management of access control we have designed and implemented a
single-sign-on and attribute-based authentication and authorization
infrastructure based on the Shibboleth software, which has been
developed by the Internet2 Middleware Initiative. Shibboleth is usually
used for protecting browser-based access of web resources. We have
designed and implemented an extension to protect web services using the
Simple Object Access Protocol. This extension allows both user and
machine authentication for web services. As a proof of concept, we
implemented a complete reservation system for sensor nodes in the
Wisebed test-bed federation. Two different user interfaces based on a
web page and an iPhone application have been implemented. Although
implemented for Shibboleth, the architecture can be easily adapted to
other authentication and authorization infrastructures.

About the Speaker

Torsten Braun got his Ph.D. degree from University of Karlsruhe
(Germany) in 1993. From 1994 to 1995 he has been a guest scientist at
INRIA Sophia-Antipolis (France). From 1995 to 1997 he has been working
at the IBM European Networking Centre Heidelberg (Germany) as a project
leader and senior consultant. He has been a full professor of Computer
Science at the University of Bern (Switzerland) since 1998 and director
of the Institute of Computer Science and Applied Mathematics at
University of Bern since 2007. He has been member of the SWITCH (Swiss
education and research network) board of trustees since 2001.

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